Copying-paper



UNITED STATES PATENT Orrrcn.

EMORY I. NICHOLS, OF SANFRANCISCO, CALIFORNIA.

COPYING-PAPER.

SPECIFICATION forming part of Letters Patent No. 359,170, dated March 8, 1857.

Application tiled July 30, 182 5. Serial No. 173,095.

To aZZ whom it may concern:

Be it known that I, EMORY I. NICHOLS, of the city and county of San Francisco, State of California, have invented an Improvement in Copying-Paper and I hereby declare the following to be a full, clear, and exact description of the same.

My invention relates to a new and useful copying-paper and my invention consists in a piece or sheet of blotting-paper saturated and coated slightly with a liquid solution of glue, water, ammonia, sugar, and glycerine.

In order that my invention may be more fully understood and can be practiced by those desiring to do so, I will now describe particularly the manner of making and the manner of using the paper, together with its advantages.

I first take a sheet of any flexible and absorbent material or unsized paper, such as blottingpaper. This is to form the basis of my copying-paper. I then prepare a mixture of the following ingredients,in the proportions specified: best white glue, four parts; pure water,five parts ammonia,three parts; sugar, two parts glycerine, eight parts. ture I prepare in the following manner The glue is soaked in the water and ammonia until it is soft. Heat is then applied until the glue is melted, when the sugar and glycerine are added and the composition brought to a boiling-point; or treat until thoroughly mixed. This mixture is applied,whilc still hot, to the sheet of blotting-paper, the application being made with a brush or otherwise, as may be convenient. It islaid on in sufficient quantity to cause it to penetrate or saturate the paper and leave a thin coating or film on its surface. I then let the paper so saturated and coated stand two or three days, when it will be ready for use.

The manner of its use is as follows: First wet the prepared paper on that surface on which the coating of composition is, the wet ting being done with acommon copying-brush or sponge. Keep the same wet from one to two minutes, according to the density of the lines required to be transferred. Then place the writing, drawing, or other delineation (which has been made with a suitable ink, such as .the aniline inks used in the hecto- This mix:

(No specimens.)

graph process) with the writing side to the prepared paper. Then press the writ-ing on the copying-paper with the hand, or run a roller over it should the same be a drawing of large size. Let it stand for about a minute, and then remove it, when it will be found that the writing or other delineation is impressed on the surface of the copying-paper. Now take the sheet upon which the impression is to be transferred and place it upon the copyingpaper,smoothing it over gently. When removed the impression will be upon it in the right manner. Successive sheets are thus treated.

Should the copying'paper become dry or sticky, asit will after every few impressions, it should be moistened again with water. After the operation has been completed the copyingpaper is laid aside, and in about twenty-four hours it is ready for use again to take a fresh impression and transfer it to other paper. The operation can be repeated from time to time by simply moistening with water the surface of the copying-paper.

I am aware of the ingredients which form the impression pad or surface of the hectograph, and a comparison of said ingredients with those which I use in preparing my copying-paper will show that several are common in both. By an examination of the description of said hectograph it will be seen that one of the essentials is that the pad or impressionsurface shall have the property of remaining moist. This propertyis imparted to it by the large proportion of glyeerine which is usedin the composition. Itwill be seen that the proportion of glycerine in my composition with which I treat the blotting-paper is with re spect to the glue as two to one, while in the hectograph theproportiou of gl ycerine to gelatine is as four to one. This results in a very essential and important difference, which I will now point out. The hectograph impression-surface remains always moist and non-absorbent,which necessitates the washing off of the impression after one operation of copying has been completed. My copying-paper does not remain moist, but has, on the contrary, to be frequently wet with water; but it does not have to be washed to remove the impression, as the whole of it will be absorbed ICO slightly coated with a solution or composition of matter consisting of glue, water, ammonia, sugar, and glycerine, prepared substantially in the proportions specified.

In witness whereof I have hereunto set my hand.

EMORY I. NICHOLS.

WVitnesses:

S. H. NoURsn, G. D. COLE. 

